Sökresultat:
1177 Uppsatser om Forest fuel - Sida 4 av 79
Hur styr gruppcertifikatägarnas strategier vilka skogsägare som blir del av FSC-cerfifikaten?
This study investigates the relationship strategies the group Forest Stewardship Council (FSC) certification holder has with the forest owners. The (FSC) standard enables an organization to manage a group of forest management units under a single certificate, a process referred to as group certification.
Some certificate holders want a close relationship with the forest owner before they are offered to become part of their certificate. Other certificate holders have less strict demands on a close relationship with the forest owner before they are offered to become part of their certificate.
The study shows that it is in many ways desirable to have a close relationship between forest owner and group certification holder..
Bränsleceller i personbilar : En teknoekonomisk well-to-wheel analys av vätgas som fordonsbränsle
Several technical solutions are ready to step forward as the new generation of propellant, and this report aims to explore the possibility of commercializing fuel cell cars. The report is based on current research and data from today's technology and engineering solutions that are estimated to be commercially realized before 2020.A mapping of today?s different fuel cell options has shown that the most suitable fuel cell option is the Proton Exchange Membrane Fuel Cell, which uses hydrogen as fuel. The report is focusing on a techno-economic well-to-wheel analysis of hydrogen and the energy balance and costs in a system perspective. The basis for this analysis consists of two centralized methods of production, steam methane reforming (SMR), and alkaline water electrolysis.
Strategier för skogsägande i svenska skogsföretag :
This final thesis consists of an investigation of how suitable it is to vertically integrate forest in Swedish forest companies. Different strategies to obtain raw materials have been evaluated and the advantages and disadvantages have been weighted against each other.
The investigations contain a number of interviews with represents from companies with different strategies and persons that in different ways have faced the question of issue. An account study of SCA´s forest ownership has also been performed.
The benefits for a forest company to vertical integrate forest consist mainly of safety in delivery, control over the supply chain and company image.
Attityder till certifieringssystemen FSC och PEFC i skogsbranschen
Different groups in the forestry sector were likely to have different views regarding the responsibility for an environmentally sustainable forestry and the benefits of certification and this study aimed to examine the attitudes that existed in the forestry sector to the certification schemes FSC and PEFC. In the study a survey and a questionnaire were sent out to different groups. The investigation was made with respect to three groups: forest owners, forest contractors and employees working with the certification schemes on a daily basis at the forest company Södra. The groups agreed that the owner of the forest had the main responsibility for an environmentally sustainable forestry. The study revealed that all three groups highly valued the environmental aspect of certification.
Behandling av konfliktbestånd - problem och möjligheter :
Overdue cleanings have for a long time been an important topic of discussion within the forestry sector. When stands that have not been pre-commercially thinned are reaching the level of commercial thinning, many problems occur in terms of decision-making and economical outcomes. These types of stands are commonly known as conflict-stands.
The work was carried out partly as an interview survey towards representatives from the forest sector and the energy sector, partly as a case study of conflict-stands situated in Böksholm, north of Växjö and in Tönnersjö east of Halmstad. The criteria for the studied stands were that they had to be dominated by Norway spruce and be in a severe status of ?conflict?.
The aim of the interview was to get an overview of the situation today, and also analyse trends in terms of conflict stands.
Hur uppfattas pcSKOG AB och pcSKOG-gård av privata skogsägare? : en undersökning av en programvara för privatskogsbruket
pcSKOG-gård is a computerised manager plan for private forest owners, developed by the
pcSKOG AB. The program is based on forest stand data, joined with a map of the forest and
GIS-applications. The purpose is to offer a program for private forest owners managing the
forest and with the possibility of updating the actual status of the forest.
The company pcSKOG AB is the leading producer of programs for forest management and
has developed the program since 1997. The program is currently the most common program
used by private forest owners in Sweden.
The aim of this thesis, leading to MSc in forestry, is to investigate the purpose of the private forest owners when purchasing the pcSKOG-gård. The thesis also studies how private forest owners use the program, what they use it for and how the private forest owners state that the program has achieved to fulfil their expectations.
The thesis is also a market research concerning the knowledge and attitudes the private forest owners have about the program and associated services.
The study material has been collected during two phases.
Hållbar energi : - Ett initiativ till utveckling av bränsleceller i Sverige
In the world we live in today the environmental issues has become increasingly important, and we have begun to realize that we can not continue to use fossil fuels at the rate we do. When it comes to generating electricity we are constantly trying to come up with cleaner and more efficient solutions. The fuel celltechnology is one such alternative and has been around for over 100 years. Yet, it is not until now that the world has started to notice this great technology. The fuel cell has been developed in several areas and can today be used for handheld electronics, vehicles and small settlements.
Förutsättningarna för ett parallellt generation IV system vid svensk nybyggnation av kärnkraft.
A new build in the Swedish nuclear power system would entail increased re-quirements for the proposed repository, which is adapted after the reactors of today. With a fast reactor, capable of burning nuclear waste, operating in parallel with the light water reactors, the increased requirements on the repository could be reduced.In this thesis, simulations of a light water reactor and a fast reactor have been performed by using the Monte Carlo code Serpent to investigate the changes in the fuel inventory. The light water reactor in the study is a boiling water reactor and the fast reactor of the type sodium-cooled fast reactor and they have been used for three different operation scenarios.By studying the fuel composition and the results from the simulations of the three scenarios conclusions can be drawn. Conclusions regarding the change of the fuel inventory and decay heat in Clab as well as the interim storage facility and in the repository. Depending on the operation alternative the changes dif-fered significantly and especially regarding the mass of burned actinides for different fuels in the fast reactor.The lowest increase of fuel assemblies was meet when using 50 years old fuel with 20MWd/kg U burnout and 2,0 % enrichment for start up of the fast reactor and 30 years old fuel assemblies with 50MWd/kg U burnout and 4,7 % enrichment for the further operation of the reactor.The increase of the number of fuel assemblies was 3174, which is equivalent to 641tons of heavy metal.
Den livgivande elden och det livsviktiga bränslet : Bruket av eld och behovet av bränsle på mesolitiska och tidigneolitiska boplatser i Norrland.
Research on Stone Age hunters and gatherers in Norrland has been lively since the 1960s. Central to this research are questions about the organization of society, sedentariness, continuity and resource management. One central part of life in the taiga is the need for fire and fuel. This aspect has been little discussed in conjunction with the mentioned research questions. My goal is to show that the matter of fire and fuel is an important one that needs to be taken in to consideration when discussing Stone Age Norrland and hunter/gatherers.
Marknadsundersökning för SCA Skog AB avseende utbor i Mälardalen :
The need of raw material does of course fluctuate but the long term view is an increasing demand due to the growing consumption of sawn timber products, pulp, paper and lately also biomass. This has led to a keener competition for wood. At the same time there is an ongoing structural change of a significant part in the Swedish wood supply market, the private forest owners. In 1992,
22 % of Sweden´s 335 000 private forest owner lived apart from their forest. In 2007 this figure had risen to 36 %.
Klippning i klena gallringar : prestationsstudie av Forest ebeaver
Forest ebeaver is, equipped as a bio-energy harvester, approximately four and a half meter long and weigh just over two tons. The main purpose of this report is to find out whether a small machine like Forest ebeaver can be profitable used in early thinning. To find this out a study has been made using the machine to thin in a young pine stand..
Betydelsen av skogsbruksplaner som verktyg vid anskaffning av virke
Forest management plans have been sold to private forest owners by wood supplying companies for a long time. These plans are considered to be effi-cient tools to identify measures and wood volumes, and are simply a starting point for discussions between private forest owners and round wood pur-chasers. However, large variations are observed between different purchas-ers, in their usage of the plans.
The purpose of this report is to identify to what extent a forest management plan can promote an increase in the amount of wood which a round wood purchaser can obtain and to find differences in the way of using the plans between different wood purchasers. Furthermore, the purpose is also to ana-lyse if varying owner structures can be underlie variations in the selling of forest management plans.
Qualitative interviews with nine of Stora Enso?s round wood purchasers were performed.
Marknadsundersökning av Södra skogsägarnas medlemmar inom Gislaveds verksamhetsområde
This study is done on behalf of Södra skogsägarna in the autumn of 2012. The main purpose of the study is to get an explanation to why some of the members are passive in their forestry, and how Södra can stimulate them to become more active. To achieve this a questionnaire study was conducted on the members of Södra in the community of Gislaved.
The result of the study shows that there are many different factors that influence whether the forest owner is active or not. Examples of those factors are timber prices, the forest owner's objectives and the forest owner's financial situation. The main goal for the forest owners in the survey was to obtain high economic result and to increase the standing timber volume for the next generation.
En skogshistorisk jämförelse mellan två närbelägna landskap med olika mångfald i östra Småland :
This study shows the historical development of the forests in Hornsö and Ebbegärde state forest area in eastern Småland situated in southern Sweden..
Enkätundersökning hos skogsägare inom SCA Skog Norrbottens Förvaltningsområde
This report has been done in collaboration with SCA Skog, Norrbottens Forest Management Area. The purpose of the survey is to try to find out what the forest owners who either live in Norrbottens Forest Management area or outside but has their forest holdings in the administrative area has the vision of SCA Forest and their forest services offered by the administration. But also to find out the presences of other timber buying players who procures timber in the administrative area. This study seeks to determine if there are deficiencies that may need changes or improvements to the prevailing conditions in Norrbottens management area.
The literature study is about how to design a questionnaire based on what you want to know and what to consider in order to eliminate the problem of constructing a questionnaire.
A questionnaire was sent to 400 randomly selected forest owners who have their forest holdings within SCA Forest Norrbotten Management Area. And of the 400, it was 181 respondents with 39 women and 138 men.